68565661 has 8 divisors (see below), whose sum is σ = 72385920. Its totient is φ = 64766592.

The previous prime is 68565659. The next prime is 68565667. The reversal of 68565661 is 16656586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68565661 - 2¹ = 68565659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68565667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1596 + ... + 11818.

It is an arithmetic number, because the mean of its divisors is an integer number (9048240).

Almost surely, 2^68565661 is an apocalyptic number.

It is an amenable number.

68565661 is a deficient number, since it is larger than the sum of its proper divisors (3820259).

68565661 is a wasteful number, since it uses less digits than its factorization.

68565661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10595.

The product of its digits is 259200, while the sum is 43.

The square root of 68565661 is about 8280.4384545747. The cubic root of 68565661 is about 409.2941672930.

The spelling of 68565661 in words is "sixty-eight million, five hundred sixty-five thousand, six hundred sixty-one".